A method for preparing hollow ptpd nanomaterials using cuprous oxide as a template

A technology of cuprous oxide and nanomaterials, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of severe redox reaction, inability to accurately copy template morphology, rough surface of final product, etc., and achieve the effect of precise composition control

Active Publication Date: 2017-05-17
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under heating conditions, chloroplatinic acid and sodium chloropalladate and Cu 2 The redox reaction of O is very violent, resulting in an extremely rough surface of the final product, which cannot accurately replicate Cu 2 Morphology of O-template

Method used

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  • A method for preparing hollow ptpd nanomaterials using cuprous oxide as a template
  • A method for preparing hollow ptpd nanomaterials using cuprous oxide as a template
  • A method for preparing hollow ptpd nanomaterials using cuprous oxide as a template

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Experimental program
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Effect test

Embodiment 1

[0029] The method for preparing hollow PtPd nanomaterials with cuprous oxide as a template of embodiment 1 may further comprise the steps:

[0030] (1) Ultrasonically disperse 10 mg of cuprous oxide with a cubic structure in 10 ml of water, and add 20 mM H 2 PtCl 6 aqueous solution and 33mM Na 2 PdCl 4 aqueous solution, so that the atomic ratio Pt / Pd in ​​the reaction solution is 4:1, PtCl 6 2 - and PdCl 4 2 -The mol ratio of the sum and cuprous oxide is 1.4: 1, stirring and reacting 60min at this temperature;

[0031] (2) Move the reaction system in step (1) into a heating device and heat it to 60°C at a heating rate of 1°C / min, and continue to react at this temperature for 120min;

[0032] (3) After the reaction is completed, the product is centrifuged at 5000 rpm for 5 min, and 20% ammonia water is added to complex and remove the cuprous oxide nucleus, and then 0.1mol / L nitric acid is added to react at 25° C. to remove the copper produced by the disproportionation re...

Embodiment 2

[0034] The method for preparing hollow PtPd nanomaterials with cuprous oxide as a template of embodiment 2 comprises the following steps:

[0035] (1) Ultrasonically disperse 10 mg of cuprous oxide with a cubic structure in 10 ml of water, and add 20 mM H 2 PtCl 6 aqueous solution and 33mM Na 2 PdCl 4 aqueous solution, so that the atomic ratio Pt / Pd in ​​the reaction solution is 4:1, PtCl 6 2 - and PdCl 4 2 -The mol ratio of sum and cuprous oxide is 2.0: 1, stirring reaction 50min at this temperature;

[0036] (2) Move the reaction system of step (1) into a heating device and heat it to 62°C at a heating rate of 2°C / min, and continue to react at this temperature for 100min;

[0037] (3) After the reaction is completed, the product is centrifuged at 8000 rpm for 4 min, and 25% ammonia water is added for complexation to remove the cuprous oxide nucleus, and then 0.2 mol / L of nitric acid is added to react at 20° C. to remove the copper produced by the disproportionation re...

Embodiment 3

[0039]The method for preparing hollow PtPd nanomaterials with cuprous oxide as a template of embodiment 3 may further comprise the steps:

[0040] (1) Ultrasonically disperse 10 mg of cuprous oxide with a cubic structure in 10 ml of water, and add 20 mM H 2 PtCl 6 aqueous solution and 33mM Na 2 PdCl 4 aqueous solution, so that the atomic ratio Pt / Pd in ​​the reaction solution is 4:1, PtCl 6 2 - and PdCl 4 2 -The mol ratio of the sum and cuprous oxide is 2.3: 1, stirring reaction 30min at this temperature;

[0041] (2) Move the reaction system in step (1) into a heating device and heat it to 65°C at a heating rate of 3°C / min, and continue to react at this temperature for 90min;

[0042] (3) After the reaction is completed, the product is centrifuged at 10,000 rpm for 3 min, and 25% of ammonia water is added to complex and remove the cuprous oxide nucleus, and then 0.5 mol / L of nitric acid is added to react at 10° C. to remove the copper produced by the disproportionation...

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Abstract

The invention discloses a method for preparing hollow PtPd nanomaterials using cuprous oxide as a template, comprising the following steps: (1) uniformly dispersing cuprous oxide in water, adding PtCl62‒ and PdCl42 under stirring conditions at 20-25°C ‒ aqueous solution, stirred and reacted at this temperature for 30-60min; (2) Move the reaction system in step (1) into a heating device and heat it to 60-65°C at a heating rate of 1-3°C / min, and continue at this temperature React for 90‑120 min; (3) After the reaction is completed, the cuprous oxide nucleus is removed to obtain a hollow PtPd nanomaterial. The hollow PtPd nanomaterial obtained by the present invention not only accurately replicates the morphology of the cuprous oxide template, but also makes the atomic ratio Pt / Pd of the hollow PtPd nanomaterial similar to the atomic ratio Pt / Pd in ​​the reaction solution, which conforms to the stoichiometric ratio of the reactants , to achieve precise composition control.

Description

technical field [0001] The invention relates to the technical field of hollow nanomaterials, in particular to a method for preparing hollow PtPd nanomaterials by using cuprous oxide as a template. Background technique [0002] Hollow nanomaterials have a large specific surface area, rich pore structure, and small constituent units, which can accommodate a large number of guest molecules or larger molecules, making them have unique properties in practical applications. Hollow PtPd nanomaterials combine the advantages of hollow structure and noble metal nanoparticles, and have properties such as low density, large specific surface area, high stability, and surface permeability. Compared with unit Pt catalysts, they have more catalytic active sites and more Strong anti-chloride ion poisoning ability and greatly improved electrocatalytic activity make it have special application prospects in the fields of biochemistry, catalysis, and material science. It is reported that cubic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/0549B22F1/054
Inventor 田亮亮陈艳玲杨聪伍沈平夏楷东
Owner CHONGQING UNIV OF ARTS & SCI
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